For any issues with SDL Language Cloud Machine Translation or SDL Online Translation Editor you can contact us via the Help & Support button.
The Help & Support button is accessible in the Language Cloud account. https://cxc-languagecloud.sdl.com/#app=languagecloud&entry=home
In the Help & Support window you can look for articles that might help you or you can log a ticket by filling in all the required fields in the form on the right.
From SDL Trados Studio:
File->Language Cloud and click on any of the connection icons to be taken to your Language Cloud account where you find the above button.